How do i make Xerath work ?

A few months ago I picked up Xerath and up to date I have 100 ranked games played on him. My winrate in midlane hovers around 56 %. However, on all of my other mains my winrate is way higher.
What I can tell, I almost always lose lane but come back in teamfights later on. I would be happy if you could give me some insight !